Caffeine Keeps Morning People Up All Night, Leaves Night Owls…

Anyone who's ever had trouble sleeping has developed elaborate theories on how and why caffeine affects them. It's usually something along the lines of, "If I drink a cup of coffee after 11 a.m. on the third Tuesday of the month, I'll be up all night." But some new research is showing that the power caffeine holds… » 3/01/12 11:55pm 3/01/12 11:55pm